CuInS2 quantum dots (QDs) have gained significant attention owing to their remarkable broadband emission, making them desirable for various optoelectronic applications requiring efficient luminescent nanomaterials. How-ever, maximizing radiative recombination in CuInS2 QDs necessitates minimizing intragap trap states. A common approach involves the introduction of Zn during the synthesis, which typically promotes the formation of a ZnS shell that passivates the QD surface. Despite its importance, the characterization and quantification of Zn incorporation using conventional techniques, such as optical spectroscopy or electron microscopy, remains challenging. In this study, we utilized X-ray absorption spectroscopy, in both X-ray absorption near-edge structure and extended X-ray absorption fine structure spectral ranges, to investigate Zn incorporation into CuInS2 QDs, probing at the Zn, S, and Cu K-edges. This approach allowed us to detect the formation of a ZnS surface shell, tentatively quantifying its thickness, and to distinguish between Zn as a substituent at the shell or as an interstitial defect. Additionally, we explored the dynamical properties of CuInS2 QDs using time-resolved optical spectroscopies, particularly in the presence of electron and hole acceptors (benzoquinone and phenothiazine), observing that hole transfer is highly sensitive to shell thickness. These results provide deeper insights into the Zn-induced shell, A.B.-C. is grateful to the Spanish “Ministerio de Universidades” and the “Plan de Recuperación, Transformación y Resiliencia”, as well as the UAM, for his “Margarita Salas” grant (ref CA1/RSUE/2021-00809). In addition, he receives funding from the European Union’s Horizon 2020 research and innovation programme under the Marie Sklodowska-Curie agreement No. 101034431 and from the “Severo Ochoa” Programme for Centres of Excellence in R&D (CEX2020-001039S/AEI/10.13039/501100011033). W.G. acknowledges funding from Spanish Ministry of Universities through “Ayudas Beatriz Galindo” (BEAGAL18/ 00092), Regional Government of Madrid and Universidad Autónoma de Madrid through “Proyectos de I+D para Investigadores del Programa Beatriz Galindo” grant (ref SI2/ PBG/2020-00003), Spanish Ministry of Science, Innovation and Universities through “Proyectos de I+D+i 2019” grant (ref PID2019-108678GB-I00), and “Proyectos de I+D+i 2022” grant (ref PID2022-140257NB-I00). BRCV and LAP thank São Paulo Research Foundation, FAPESP, under grants 2018/ 15574-6 and 2022/06470-8. B.R.C.V. also thanks FAPESP for the postdoctoral scholarship under grants 2020/16077-6 and 2024/01722-4. A.F.V.F. thanks FAPESP under the grant 2023/ 10395-4. A.F.N. acknowledges the support from the FAPESP (grant no. 2017/11986-5) and Shell and the strategic importance of the support given by ANP (Brazil’s National Oil, Natural Gas, and Biofuels Agency). MAS acknowledges the support from the CNPq and FAPEMIG (grant no. APQ02598-23). J.C.-G. acknowledges the MICINN-FEDER (Nos.: PID2021-128313OB-I00 and PID2024-162801OB-I00), support from the Regional Government of Madrid (TEC-2024/ TEC-459 SYNMOLMAT-CM), a Research Consolidation Grant (No. CNS2022-36191) and project PDC202-3145871I00 from the Spanish Ministry of Science and Innovation. V.V.-M. acknowledges grants TED2021-131906A-100 and RYC2022-035200-I funded by the Spanish Ministry of Science, Innovation and Universities (10.13039/501100011033) and support from the Regional Government of Madrid (2019-T2/ IND-12737 and 2024-T1/TEC-31349). S.G.-O. is grateful to the Spanish Ministry of Science and Innovation for a Ph.D. grant (FPI, PRE2019-09345). This work was also partially funded by the regional government of Madrid (Spain) through the Tecnologias 2024 program, project MATRIX-CM (TEC2024/TEC-85)

Datasets associated to the publicaton 10.1021/acs.chemmater.5c01878.
The readme files for each dataset are within the corresponding folder., All data can be accessed with any program that reads csv and txt.
TAS raw data need processing, but processed data is also given.

Moiré materials represent strongly interacting electron systems bridging topological and correlated physics. Despite notable advances, decoding wavefunction properties underlying the quantum geometry remains challenging. Here we utilize polarization-resolved photocurrent measurements to probe magic-angle twisted bilayer graphene, leveraging its sensitivity to the Berry connection that encompasses quantum 'textures' of electron wavefunctions. Using terahertz light resonant with optical transitions of its flat bands, we observe bulk photocurrents driven by broken symmetries and reveal the interplay between electron interactions and quantum geometry. We observe inversion-breaking gapped states undetectable through quantum transport, sharp changes in the polarization axes caused by interaction-induced band renormalization and recurring photocurrent patterns at integer filling factors of the moiré unit cell that track the evolution of quantum geometry through the cascade of phase transitions. The large and tunable terahertz response intrinsic to flat-band systems offers direct insights into the quantum geometry of interacting electrons and paves the way for innovative terahertz quantum technologies., R.B. acknowledges funding from the European Union’s Horizon 2020 research and innovation programme under the Marie Skłodowska-Curie grant agreement no. 847517. J.B. acknowledges support from the European Union’s Horizon Europe programme under grant agreement no. 101105218. K.N. acknowledges funding from the European Union’s Horizon 2020 research and innovation programme under the Marie Skłodowska-Curie grant agreement no. 713729. S.C. acknowledges funding by the Departament de Recerca i Universitats de la Generalitat de Catalunya (no. 2021 SGR 01443). E.K. acknowledges funding under the Marie Skłodowska-Curie Fellowship project SuperTera. IMDEA Nanociencia acknowledges support from the ‘Severo Ochoa’ Programme for Centres of Excellence in R&D (no. CEX2020-001039-S/AEI/10.13039/501100011033). P.A.P. and F.G. acknowledge funding from the European Commission, within the Graphene Flagship Core 3 via grant no. 881603 and from grant no. NMAT2D (Comunidad de Madrid, Spain), SprQuMat, from NOVMOMAT, project PID2022-142162NB-I00 funded by MICIU/AEI/10.13039/501100011033 and by FEDER, UE, as well as financial support through the (MAD2D-CM)-MRR MATERIALES AVANZADOS-IMDEA-NC. Z.Z. acknowledges support from the European Union’s Horizon 2020 research and innovation programme under the Marie Skłodowska-Curie grant agreement no. 101034431. S.B.-P. acknowledges support from the ‘Presencia de la Agencia Estatal de Investigación’ within the ‘Convocatoria de tramitación anticipada, correspondente al año 2020, de las ayudas para contractos predoctorales (ref. no. PRE2020-094404) para la formación de doctores contemplada en el Subprograma Estatal de Fromación del Programa Estatal de Promoción del Talento y su Empleabilidad en I+D+i, en el marco del Plan Estatal de Investigacón Científica y Técnica de Innovación 2017–2020, cofinanciado por el Fondo Social Europeo’. E.I. and C.S. acknowledge funding from the European Union’s Horizon 2020 research and innovation programme under grant agreement no. 881603 (Graphene Flagship) and from the European Research Council (ERC) under grant agreement no. 820254, the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) under Germany’s Excellence Strategy—Cluster of Excellence Matter and Light for Quantum Computing (ML4Q) EXC 2004/1–390534769 and the FLAG-ERA grant PhotoTBG–471733165. H.A. acknowledges funding from the European Union’s Horizon 2020 research and innovation programme under Marie Skłodowska-Curie grant agreement no. 665884. K.W. and T.T. acknowledge support from JSPS KAKENHI (grant nos. 20H00354 and 23H02052) and World Premier International Research Center Initiative (WPI), MEXT, Japan. J.C.W.S. acknowledges support from the Singapore Ministry of Education under its Academic Research Fund Tier 2 grant no. MOE-T2EP50222-0011 and Tier 3 grant no. MOE-MOET32023-0003 Quantum Geometric Advantage. G.R. acknowledges support from the Simons Foundation, the ARO MURI grant no. W911NF-16-1-0361 and the Institute of Quantum Information and Matter. C.L. was supported by start-up funds from the Florida State University and the National High Magnetic Field Laboratory. The National High Magnetic Field Laboratory is supported by the National Science Foundation through NSF/DMR-2128556 and the State of Florida. P.J.-H. acknowledges support from the National Science Foundation (no. DMR-1809802), the STC Center for Integrated Quantum Materials (NSF grant no. DMR1231319), the Gordon and Betty Moore Foundation’s EPiQS Initiative through grant no. GBMF9463, the Ramon Areces Foundation and the ICFO Distinguished Visiting Professor program. P.J.-H. acknowledges funding for his sabbatical by CEX2019-000910-S [MCIN/AEI/10.13039/501100011033] Fundacio Cellex, Fundacio Mir-Puig, and Generalitat de Catalunya through CERCA. This material is based on work supported by the Air Force Office of Scientific Research under award no. FA8655-23-17047. Any opinions findings, and conclusions or recommendations expressed in this material are those of the author(s) and do not necessarily reflect the views of the United States Air Force. F.H.L.K. acknowledges support from the ERC TOPONANOP under grant agreement no. 726001, the Gordon and Betty Moore Foundation through grant no. GBMF12212 and the Government of Spain (nos. FIS2016-81044; PID2019-106875GB-100; and Severo Ochoa CEX2019-000910-S [MCIN/AEI/10.13039/501100011033], PCI2021-122020-2A and PDC2022-133844-100 funded by MCIN/AEI/10.13039/501100011033). This work was also supported by the European Union NextGenerationEU/PRTR (PRTR-C17.I1) and EXQIRAL 101131579, Fundació Cellex, Fundació Mir-Puig and Generalitat de Catalunya (CERCA, AGAUR, 2021 SGR 014431656). Views and opinions expressed are those of the author(s) only and do not necessarily reflect those of the European Union Research Executive Agency. Neither the European Union nor the granting authority can be held responsible for them. Additionally, the research leading to these results received funding from European Union’s Horizon 2020 programme under grant agreement nos. 881603 (Graphene Flagship Core 3) and 820378 (Quantum Flagship). This material is based on work supported by the Air Force Office of Scientific Research under award no. FA8655-23-1-7047. R.K.K. acknowledges funding by MCIN/AEI/10.13039/501100011033 and by the ‘European Union NextGenerationEU/PRTR’ PCI2021-122020-2A within the FLAG-ERA grant (PhotoTBG), by ICFO, RWTH Aachen and ETHZ/Department of Physics, and support from the Ramon y Cajal grant no. RYC2022-036118-I funded by MICIU/AEI/10.13039/501100011033 and by ‘ESF+’., With funding from the Spanish government through the "Severo Ochoa Centre of Excelence" accreditation (CEX2020-001039-S), With funding from the Spanish government through the "Severo Ochoa Centre of Excelence" accreditation (CEX2019-000910-S), Peer reviewed

MnTe has recently emerged as a canonical altermagnet, a newly identified class of magnetism characterized by compensated antiferromagnetic order coexisting with spin-split electronic bands, traditionally considered exclusive to ferromagnets. However, the extent to which altermagnetism persists as altermagnets are thinned to the 2D limit remains largely unexplored. Here, the magnetic behavior of two-dimensional (2D) MnTe is investigated, specifically atomically-thin monolayers (MLs) and bilayers (BLs) grown on graphene/Ir(111) substrate, by combining experimental scanning tunneling microscopy, X-ray photoelectron microscopy, X-ray absorption spectroscopy, and X-ray magnetic circular dichroism with density functional theory calculations. It is found that while ML and BL MnTe adopt atomic structures with symmetries incompatible with altermagnetism, they exhibit intriguing magnetic phases: the BL forms a highly-robust layered antiferromagnet with in-plane spin anisotropy, whereas the ML presents characteristics compatible with spin-glass behavior below its freezing temperature, a phenomenon not previously observed in an atomically thin material. These findings highlight how reduced dimensionality can promote the emergence of unusual magnetic structures distinct from those of their 3D counterparts, providing new insights into low-dimensional magnetism., This work was supported by the Spanish Ministry of Science and Innovation and the European Union, Grant Nos. PID2021-123776NB-C21 (CONPHASETM), PID2021-128011NB-I00 and PID2024-157655NB-I00. Comunidad de Madrid through grant “Materiales Disruptivos Bidimensionales (2D)” MAD2D-CM-UAM. Financial support from MAD2D-CM projects — MRR MATERIALES AVANZADOS-IMDEA-NC and MRR MATERIALES AVANZADOS-UAM — is also acknowledged. IMDEA Nanociencia and IFIMAC acknowledge financial support from the Spanish Ministry of Science and Innovation through the “Severo Ochoa” Programme for Centres of Excellence in R& D (Grant CEX2020-001039-S) and “María de Maeztu” (Grant CEX2023-001316-M) Programme for Units of Excellence in R& D, respectively. M.G.C. acknowledges funding from the European Union's Horizon 2020 research and innovation programme under the Marie Skłodowska-Curie grant agreement no. 101034431 (IDEAL programme) and financial support from MCIN with funding from European Union NextGenerationEU (PRTR-C17.I1) and Generalitat de Catalunya. M.G. acknowledges financial support through the “Ramón y Cajal” Fellowship program (RYC2020-029317-I) and the “Ayudas para Incentivar la Consolidación Investigadora” programme (CNS2022-135175). Financial support through the “Soluciones sostenibles del NanoMAGnetismo para TIC” (Mag4TIC-CM) is acknowledged. I.D.B. acknowledges funding from the European Union's Horizon Europe research and innovation programme under the Marie Skłodowska-Curie grant agreement no.101063547 (STORM) and support from the “Ramón y Cajal” program, grant no. YC2022-035562-I. We acknowledge beam time on BOREAS (BL29) beam line at ALBA Synchrotron under proposal 2023027388, and beam line scientist Dr. M. Valvidares for his supportive commitment to the project., With funding from the Spanish government through the "Severo Ochoa Centre of Excellence" accreditation (CEX2020-001039-S)., With funding from the Spanish government through the "Unit of Excellence Maria de Maeztu" accreditation (CEX2023-001316-M)., Peer reviewed